TCHH and esophageal squamous cell carcinoma: After measuring the IC50 of THL in KYSE 30 (IC50 = 6.012×10-7 mol/L) and KYSE 150 (IC50 = 1.121×10-6 mol/L) cells (Figure 2A and 2B), we found that THL could obviously impair cell viability in ESCC (Figure 2C).